[DOCS] Updated the max and recommended numbers of tablets per server
[DOCS] Updated the max and recommended numbers of tablets per server

Change-Id: Ida16e45477bd18206f25db8cc2bf890742d4ec63
Reviewed-on: http://gerrit.cloudera.org:8080/10969
Tested-by: Kudu Jenkins
Reviewed-by: Dan Burkert <4ef91e292a55314d2653d35ff669a6bd939ce515@apache.org>

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